Inovance IS620P Series Manual

5 Troubleshooting
5
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Cause Conrming Methods Corrective Action
10. The servo drive is faulty. - Replace a new servo drive.
Er.922: Resistance of external braking resistor too small
Cause Conrming Methods Corrective Action
When an external
regenerative resistor is used
(H02-25 = 1 or 2), resistance
of the external regenerative
resistor is smaller than
minimum value required by
servo drive.
Measure resistance of the external
regenerative resistor between
P
and
C and check whether it is smaller
than H02-21 (allowed minimum
value of regenerative resistor).
If yes, connect an external regenerative
resistor matching servo drive between
P
and C and set H02-27 (resistance of
external regenerative resistor) to resistance
of the selected regenerative resistor.
If not, set H02-27 to resistance of the
selected regenerative resistor.
Er.939: Motor power cable breaking
Cause Conrming Methods Corrective Action
Motor power
cable breaking
Check whether difference between H0B-24 (phase current
valid value) and H0B-02 (internal torque reference)
reaches over 500%. Meanwhile, H0B-00 (actual motor
speed) is smaller than one fourth of rated motor speed.
Check the motor power cable
connection and reconnect wirings. If
necessary, replace a new cable.
Er.941: Parameter modication taking effect only after re-power-on
Cause:
Modification of some parameters takes effect only after servo drive is powered on again. After these
parameters are modied, servo drive reminds of re-power-on.
Cause Conrming Methods Corrective Action
Modify parameters, whose modication
takes effect only after re-power-on.
Check whether you modify parameters,
whose modication takes effect only after
re-power-on.
Re-power on the servo
system.
Er.942: Parameter storage too frequent
Cause Conrming Methods Corrective Action
A great number of parameters are
modied and stored frequently to
EEPROM (H0C-13 = 1).
Check whether host controller
performs frequent and fast
parameter modication on servo
drive.
Check the running mode. For the
parameters that need not be stored
in EEPROM, set H0C-13 to 0 before
writing operation of host controller.
Er.950: Forward limit switch warning
Cause Conrming Methods Corrective Action
Logic of DI set for
FunIN.14: P-OT (forward
limit switch) is valid.
Check whether a parameter in group H03
is set for FunIN14 (P-OT).
Check whether logic of corresponding DI
is valid in H0B-03 (monitored DI states).
Check the running mode. Send a
reverse reference or rotate motor on the
prerequisite of ensuring safety to make
logic of the forward overshoot switch
terminal invalid.

Inovance IS620P Series Specifications

General

Brand	Inovance
Model	IS620P Series
Category	Servo Drives
Language	English